<form name='userLogin'>

  <div class="container">
  <h1>Angie</h1>
    <label for='loginnametext'>Enter your login name:</label><br>
    <input type="text" id='loginnametext' ng-model='newuserid' on-keyup="loginUser()" keys="[13]" autofocus></input>

	<button class="button-link" ng-click='loginUser()' ng-disabled='!newuserid'>Login</button>

	<span ng-class="{ errors : userexists == true, noerror : userexists == false}">Username exists</span>
  </div>
</form>